Perhaps you should try some spelling variations:
thuat sach » thuat lanh
thuat san » thuat toan, thuat song, thuat lanh
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
va lang » va nang, hoa lang
lang va » lang van, hang va, lang ha
cua tre » cua te, cuu tre, cua triet
y nang » ly nang, v nang, may nang
ve cao » va cao, ve bao, ve cac
va cua » va chua, via cua, ca cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) or (thuat san)) ((y nang) OR (ky nang)) xa hoi. hieu ve cao duc va lang va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (thuat san)) ((y nang) OR (ky nang)) xa hoi. hieu ve cao duc va lang va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) or (thuat san)) ((y nang) OR (ky nang)) xa hoi. hieu ve cao duc va lang va cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (thuat san)) ((y nang) OR (ky nang)) xa hoi. hieu ve cao duc va lang va cua tre*.